Search found 2407 matches

by RobC
Wed Jan 16, 2019 11:33 am
Forum: hardware
Topic: Is this normal for a Datacentre?
Replies: 3
Views: 147

Re: Is this normal for a Datacentre?

Mine does the same if the DC is unpowered so I always try to make sure that it's powered before turning on my Master.
by RobC
Tue Jan 15, 2019 10:28 pm
Forum: off-topic
Topic: Sound Export
Replies: 14
Views: 175

Re: Sound Export

You can use B-Em to export a VGM file for playback on a PC: https://stardot.org.uk/forums/viewtopic.php?t=10620 There's also *MIDI at MDFS. You can use this to redirect SOUND commands to a MIDI interface if you have one. If you don't have a suitable interface, it shouldn't be too much work to conver...
by RobC
Tue Jan 15, 2019 7:30 pm
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 20
Views: 363

Re: New ROM / RAM Expansion Board for BBC B

Many thanks for the link. The APA-640-T-P is exactly what I'm looking for. Unfortunately, this one isn't available for sale on their website, so I'll need to contact them to see if they have stock available, and what the cost would be. Should have said that I had to contact them when I bought mine ...
by RobC
Tue Jan 15, 2019 7:12 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2724
Views: 236295

Re: Worth Taking a Look At

It comes with a RiscPC keyboard, which won’t work on the A5000. Seller knows this (I told him) but he decides not to mention. The seller helpfully suggests that it does not work because of a previously installed graphics podule. So he probably knows the two jumpers on the Genlock interface are miss...
by RobC
Tue Jan 15, 2019 6:53 pm
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 20
Views: 363

Re: New ROM / RAM Expansion Board for BBC B

Great project =D> =D> . I have a non-working Integra but it's clear that it's a great expansion. The windowing system that came with it was also very good. The one component I'm struggling to source is a 40 pin dil (or 2 20 pin sil) round pin header, approx 25mm long, that would solder to the unders...
by RobC
Sun Jan 13, 2019 3:19 pm
Forum: hardware
Topic: Beeb black plastic surround
Replies: 15
Views: 406

Re: Beeb black plastic suround

Excellent stuff - very impressive work =D> =D>

Would definitely be interested in a few of these.
by RobC
Sun Jan 13, 2019 2:50 pm
Forum: hardware
Topic: POLL: How much Sideways RAM?
Replies: 20
Views: 449

Re: POLL: How much Sideways RAM?

It might also be worth asking how many people have a Pi co-pro as this would be another option for porting games (e.g. by using the 1GHz native core or by using bank switching on the 6502 core). Either way, it's another way of getting lots of memory.
by RobC
Fri Jan 11, 2019 10:06 pm
Forum: hardware
Topic: A3000-to-A5000 ROM adapter
Replies: 18
Views: 465

Re: A3000-to-A5000 ROM adapter

I think the two halves of an 8MB SIMM have separate RAS signals and I think the address lines from the CPU effectively act as enable lines to the MEMCs but I'm not sure how the DRAM refresh works.
by RobC
Fri Jan 11, 2019 10:01 pm
Forum: hardware
Topic: Beeb black plastic surround
Replies: 15
Views: 406

Re: Beeb black plastic suround

What sort of price would we be looking at? I'd be interested in 3 or 4 (possibly 5 or 6) if they looked the part. I suspect others on here would be interested too. [Thinking about it, someone mentioned getting this done before - I remember something about them not being able to do the printing below...
by RobC
Fri Jan 11, 2019 4:08 pm
Forum: hardware
Topic: A3000-to-A5000 ROM adapter
Replies: 18
Views: 465

Re: A3000-to-A5000 ROM adapter

In which case, if you could replace the 4mb RAM in the A3000's 4mb upgrade with 8mb, then wire across the necessary signals (including the extra address line) to a twin MEMC board, you could avoid having the ROM board altogether? That's worth thinking about. I believe that the 4MB upgrade in my A30...
by RobC
Fri Jan 11, 2019 4:04 pm
Forum: general
Topic: Which games from other platforms did you wish was on the BBC?
Replies: 63
Views: 4160

Re: Which games from other platforms did you wish was on the BBC?

That would be awesome, but possibly a bit unnecessary. It is actually possible to get it running on a Z80 co-pro: https://stardot.org.uk/forums/viewtopic.php?f=3&t=6727&hilit=Zork+z80&start=60#p107157 Ah - I hadn't seen that. Are there any advantages to getting Frotz running? Also, are there any ot...
by RobC
Fri Jan 11, 2019 11:02 am
Forum: general
Topic: Which games from other platforms did you wish was on the BBC?
Replies: 63
Views: 4160

Re: Which games from other platforms did you wish was on the BBC?

KenLowe wrote:
Wed Jan 09, 2019 11:28 pm
Zork, and other Infocom adventures. It always annoyed me that these were available for the Apple IIe but not the Beeb.
Maybe we could look at porting Frotz to the Pi co-pro...
by RobC
Fri Jan 11, 2019 10:59 am
Forum: hardware
Topic: A3000-to-A5000 ROM adapter
Replies: 18
Views: 465

Re: A3000-to-A5000 ROM adapter

Well, looking at an A3000 last night, there is actually more height clearance under the keyboard than I thought there was. Thanks for looking. There certainly was an 8mb expansion for the A3000, at least one. I thought I'd seen one advertised but wasn't sure. Might dig out some old AUs to see if I ...
by RobC
Fri Jan 11, 2019 10:45 am
Forum: programming
Topic: Newbie questions: Programming tools and graphics
Replies: 6
Views: 224

Re: Newbie questions: Programming tools and graphics

For assembly language programming on modern hardware, I think most people tend to use BeebAsm as it'll generate an SSD file that you can load into an emulator. You'll probably want to know where in memory you can put your code and data - this is a good and comprehensive guide but there's also some u...
by RobC
Thu Jan 10, 2019 9:41 pm
Forum: general
Topic: Today I received.....
Replies: 4957
Views: 355312

Re: Today I received.....

trixster wrote:
Thu Jan 10, 2019 6:44 pm
An X68000!
Awesome :D =D> =D>

Always wanted one of those.
by RobC
Thu Jan 10, 2019 9:08 pm
Forum: hardware
Topic: A3000-to-A5000 ROM adapter
Replies: 18
Views: 465

Re: A3000-to-A5000 ROM adapter

Also need to consider the clearance - you'll need to fit the A5000 expansion under the A3000 keyboard, and it'll have to avoid other components. Might just be possible, but looks tight. Alternatively could save a couple of mm by removing the A3000 ROM sockets and soldering the conversion board dire...
by RobC
Wed Jan 09, 2019 10:16 pm
Forum: general
Topic: Which games from other platforms did you wish was on the BBC?
Replies: 63
Views: 4160

Re: Which games from other platforms did you wish was on the BBC?

=You know, I've just watched that video, and I can't help feeling that if you had a VideoNULA, implementing that game would be... not easy, but certainly not impossible! (NOT that I am volunteering to do so... but it's certainly do-able!) I'd agree. The scrolling would be simple and the colours eff...
by RobC
Wed Jan 09, 2019 6:39 pm
Forum: hardware
Topic: A3000-to-A5000 ROM adapter
Replies: 18
Views: 465

Re: A3000-to-A5000 ROM adapter

JonC wrote:
Wed Jan 09, 2019 5:19 pm
Umm, wouldn't that require an extra MEMC1a? or did I miss something.
Yes - but the A5000 8MB upgrades I mentioned have dual MEMC boards :)

Still need to desolder the original MEMC1A from the A3000 PCB and fit a socket but I managed to remove the ARM2 and add an ARM3 upgrade.
by RobC
Wed Jan 09, 2019 4:27 pm
Forum: hardware
Topic: A3000-to-A5000 ROM adapter
Replies: 18
Views: 465

Re: A3000-to-A5000 ROM adapter

This is great =D> =D> :D

I have several spare A5000 8MB upgrades and I'd love to fit one to my A3000.
by RobC
Mon Jan 07, 2019 7:40 pm
Forum: general
Topic: Why was Repton so loved by BBC users yet so disliked by the Commies?
Replies: 31
Views: 704

Re: Why was Repton so loved by BBC users yet so disliked by the Commies?

Thinking back to what I used my Electron for BITD, for O-Level Computer Science I connected temperature sensors to the ADC of the PLUS-1, whilst controlling relays through Darlington drivers connected to the printer port, all with BBC BASIC. This would not have been possible on a C64 with its lousy...
by RobC
Mon Jan 07, 2019 6:39 pm
Forum: hardware
Topic: Millipede Apex board not working?
Replies: 9
Views: 410

Re: Millipede Apex board not working?

Sorry this has taken so long but the Apex stuff was on my A540 hard drive and it had decided to play up! Finally got the SCSI podule working only to find that the floppy drive needed cleaning before it would format and write a disk :cry: The manual I have is the same version but I've managed to get ...
by RobC
Sun Jan 06, 2019 3:47 pm
Forum: general
Topic: Ideas please for BBC Micro splash screen
Replies: 51
Views: 980

Re: Ideas please for BBC Micro splash screen

I like the owl and Oak logos. The C65 boot screen is good but I feel it probably has too many technical details (ROM checksum?!) and I suspect the (c) 1977 message wouldn't have been a great selling point! For my money, the C64 already did it. Call me biased anyway but ut had the coolest screen of t...
by RobC
Sun Jan 06, 2019 3:30 pm
Forum: wanted
Topic: Acorn A3000 ARM 3
Replies: 23
Views: 604

Re: Acorn A3000 ARM 3

I think RISCiX makes more use of an FPA - at least my R260 detects its FPA (or did when it was working :( ).
by RobC
Sun Jan 06, 2019 1:33 pm
Forum: general
Topic: Bit of fun - One change only
Replies: 64
Views: 1365

Re: Bit of fun - One change only

The Electron was basically a mistake, alluded to in Micro Men, a set up for failure once it had been committed to. Although Micro Men does imply this, I don't think it's possible to say what would have happened if the Elk had been available in sufficient numbers for Christmas 1983. I'd agree that A...
by RobC
Sun Jan 06, 2019 9:26 am
Forum: general
Topic: Bit of fun - One change only
Replies: 64
Views: 1365

Re: Bit of fun - One change only

Here's an idea which is almost entirely cosmetic, but might have helped sales: change the OS ROM so the power-up screen has a nice colourful graphic. It's all very well to boot into a few lines of white text in mode 7, but it might not impress the punters. I'm so sure of that, given the BBC's retin...
by RobC
Sat Jan 05, 2019 12:03 pm
Forum: off-topic
Topic: Solder/flux recommendations
Replies: 10
Views: 256

Re: Solder/flux recommendations

Be nice if I don't have to remove/replace the IOC as I'd have to source a replacement...(and they are getting more expensive judging by CJE's price list!) If you do need a new IOC then PM me before going to CJE. I'm planning to go through my non-working Arcs in the next week or so and may be able t...
by RobC
Fri Jan 04, 2019 10:26 pm
Forum: off-topic
Topic: Solder/flux recommendations
Replies: 10
Views: 256

Re: Solder/flux recommendations

I use this flux.

On a side note, are you sure the IOC in your A4 is actually dead? I had the freezing/hanging/not booting problem in mine and all I needed to do was reflow the IOC.
by RobC
Wed Jan 02, 2019 4:53 pm
Forum: wanted
Topic: Acorn A3000 ARM 3
Replies: 23
Views: 604

Re: Acorn A3000 ARM 3

Hi RobC Hope you’ve had a nice Christmas & getting ready for a Happy New Year! Which ARM3 board do you have in your A3000 and which spare ARM3 do you have that isn’t working? The broken one is an IFEL (non-FPA) and, thinking about it, was possibly sold as untested/not working when I bought it. Not ...
by RobC
Mon Dec 31, 2018 9:24 pm
Forum: wanted
Topic: Acorn A3000 ARM 3
Replies: 23
Views: 604

Re: Acorn A3000 ARM 3

I upgraded my A3000 to an ARM3 a while back. The trick is to use lots of flux (credit to Dave Hitchins) - I found this helped both the desoldering and soldering process. I also hacked the socket so that I could see more of the pins. I thought I had a spare ARM3 board but, unfortunately, it's not wor...